Ship&#39;s hatch cover



March 7,1939; J. MACGRE GO R SHIP S HATCH COVER Fil ed March 3, 1937 I VEIYTOP,

Patented Mar. 7, 1939 j 1 ES .ATENT FFEQE 2,149,684 SHEPS HATCH COVER {Joseph Macgregor, Whitley Bay, England Application March 3, 1937, Serial No. 128,854

Claims. (01. 114201) This invention relates to ships hatches having is located under the upper edge of the coaming steel hatch covers and has for its object to proplate [9. An inner resilient packing joint is vide watertight jointing between a cover element formed by a packing strip 2| held in position on and an adjacent structure. the cover element by an angle 20 welded thereto.

5 According to the invention, ships hatches in- Spaced triangular webs 22 may be fixed as in 5 clude a cover element constructed to make an Fig. 2 to the inner side of the plate 1 at the lower outer metal to metal joint and an inner resilient edge thereof, said webs serving as a guide means packing joint with an adjacent structure, the arfor the cover element when same is being placed rangement being such that pressure is exerted on in position. In Fig. 1 is shown a roller R for the the faces of the metal to metal joint to cause cover, and this may take any suitable form. For 10 them to abut tightly, and to compress the resilexample, it may be mounted on an eccentric ient packing joint to a degree limited by the bush whereby partial rotation may raise or lower metal to metal joint. The pressure is exerted by the cover on the angle l8. No clamp is shown a clamping device when the joint is made by in Fig. 1, but in Fig. 2 a clamping means adapted bringing the parts together in. a horizontal dito clamp the cover on to its support comprises 15 rection, but when the parts are brought together a cleat 23 having a downwardly extending in a vertical direction, the clamping device may threaded stem 24 passing through a hole in the be omitted and the pressure exerted solely by the angle l8. a nut block 25 having a hole 26 for weight of the cover. In any event, at various a tommy bar being screwed on the stem 24 at points on the covers, possibly away from the the underside of the ledge E8. The cleat ,23 is 20 joints, clamping devices are provided to secure adapted to rest with one end on the upstanding the covers down on to the coaming, and these flange of the bulb angle ledge l8 and withrthe would naturally augment the pressure due to the other end in a suitable recess of the lug 21 rivcover"s weight. eted or welded to the outer side of plate 1. For

The cover element herein referred to may removing the cover the nut 25 is loosened suffi- 25 comprise a single piece hatch cover or an indeciently to allow the cleat 23 to be turned. into pendent section of a multi-piece hatch cover and the chain dotted position shown in Fig. 3, the the jointing may be formed between the edge of clamping d 0 e ve being e t d y t the cover element and the coaming, or between reverse opera therebeing I10 necessity t e STA . UNITE- 30 adjacent edges of two adjoining independent ove the cla p d e altogether 30 cover sections. I claim:

The invention is illustrated by Way of example A hatch Structure including, in nain the accompanying drawing, wherein: tion, a hatch cover having a down-turned flange Figure 1 is a section of the joint made in a p v d a bottom edge, a oa Seat bevertical direction between a cover and the coamlow the upper edge of the coaming on which the 35 m bottom edge of the hatch cover rests, and a soft Figure 2 shows a joint similar to Figure 1 sealing member supported on the inside of the combined with clamping means; cover flange at a higher elevation than the said Figure 3 is a plan of the clamp seen in Figure 2. b om e e thereof o y e y ngage the top 40 Referring generally to the drawing, the cover edge of the coaming and provide a compressed 40 sections between which a watertight joint is to inner seal for the hatch structure. be formed are generally indicated by the refer- 2. A hatch structure including, in combinaences A and B. Section A includes the seat l8 tion, a coaming, a metal seat surrounding the coaming l9 and other parts later to be described. same, a metal cover including a down-turned Section B is composed of an outer skin plate 3, flange of greater depth than the distance from 5 web 4, angle girder 5 and bulb angle 6, the side the top of the coaming to the seat and having plate I of section B being more clearly shown in its lower edge in metal to metal contact with the Fig. 2. seat, and a soft non-metallic compressible seal- In Figures 1 and 2, the metal to metal joint ing member carried by the inside face of the cover between a cover element B and the coaming is flange and engaging the upper edge of the coam- 5 formed by the bottom edge of the cover side ing to provide a water tight seal, the compresplate I and the upper face of the horizontal limb sion of said sealing member being limited by of an angle plate l8 welded to the outer side of the metal to metal contact between the flange of the coaming plate 19, it being particularly noted the cover and said seat. that said horizontal limb of the bulb angle I 8 3. A hatch structure comprising a coaming, 55

a seat outwardly of said coaming below the upper edge thereof, a hatch cover having a rigid side wall to rest at its bottom on said seat, and compressible packing material between the top of said coaming and a part of said hatch cover extending inwardly from the side wall thereof to provide an inner seal for the cover. v

4. A hatch structure comprising a coaming, seat outwardly of said coaming below the upper edge thereof, a hatch cover having a rigid side Wall whose bottom edge rests on said seat, a member rigid with said side wall and extending inwardly therefrom, compressible packing ma-- terial at the underside of said member and in sealing engagement with the upper edge of said coaming, and means for drawing said hatch cover downwardly to cause the bottom edge of its side wall to engage the seat and thereby limit. the compression of said packing material.

5. A hatch structure comprising a coaming, a seat member rigid with said coaming extending outwardly therefrom below the top thereof, a hatch cover having a rigid side wall to rest at its bottom on said seat member, a channel forming member rigid with said side wall extending inwardly therefrom. above the bottom thereof in overlying relationship to said coaming, a yielding packing material confined in the channel formed by said last mentioned member and in sealing engagement with the top of said coaming, and cooperating means on the seat member and cover for drawing said cover downwardly relative to said coaming.

JOSEPH MACGREGOR. 

